China-Japan tensions rise on the 75th anniversary of the Nanjing massacre

The 75th anniversary has taken on added meaning given the poor state of
bilateral ties. Japan scrambled F-15 fighters after a Chinese state-owned
plane entered airspace over islands claimed by both countries. Chinese
government ships have moved in and out of waters around the islands - known
as the Senkaku Islands in Japan and the Diaoyu Islands by China - for more
than two months. But it was the first time that Chinese planes have ever
intruded into Japanese airspace, according to the defence ministry in Tokyo,
while China defended its right to overfly what it says is its own territory.